Solutions & Explanations

Browse 4,030+ detailed solutions with multiple approaches, code in Python, Java, C++ and more.

4,030 Solutions961 Easy2102 Medium967 Hard

Title	Difficulty	Acceptance	Topics	Solution
1701. Average Waiting Time	Medium	73.1%	Array Simulation	Read
1702. Maximum Binary String After Change	Medium	48.1%	Greedy String	Read
1703. Minimum Adjacent Swaps for K Consecutive Ones	Hard	42.8%	Array Greedy+2	Read
1704. Determine if String Halves Are Alike	Easy	78.6%	Counting String	Read
1705. Maximum Number of Eaten Apples	Medium	44.2%	Array Greedy+1	Read
1706. Where Will the Ball Fall	Medium	71.9%	Array Matrix+1	Read
1707. Maximum XOR With an Element From Array	Hard	59.0%	Array Bit Manipulation+1	Read
1708. Largest Subarray Length K	Easy	65.7%	Array Greedy	Read
1709. Biggest Window Between Visits	Medium	70.3%	Database	Read
1710. Maximum Units on a Truck	Easy	75.3%	Array Greedy+1	Read
1711. Count Good Meals	Medium	32.7%	Array Hash Table	Read
1712. Ways to Split Array Into Three Subarrays	Medium	34.2%	Array Binary Search+2	Read
1713. Minimum Operations to Make a Subsequence	Hard	49.7%	Array Binary Search+2	Read
1714. Sum Of Special Evenly-Spaced Elements In Array	Hard	49.9%	Array Dynamic Programming	Read
1715. Count Apples and Oranges	Medium	75.6%	Database	Read
1716. Calculate Money in Leetcode Bank	Easy	82.4%	Math	Read
1717. Maximum Score From Removing Substrings	Medium	66.6%	Greedy Stack+1	Read
1718. Construct the Lexicographically Largest Valid Sequence	Medium	72.7%	Array Backtracking	Read
1719. Number Of Ways To Reconstruct A Tree	Hard	46.3%	Graph Tree	Read
1720. Decode XORed Array	Easy	87.3%	Array Bit Manipulation	Read
1721. Swapping Nodes in a Linked List	Medium	69.3%	Linked List Two Pointers	Read
1722. Minimize Hamming Distance After Swap Operations	Medium	69.6%	Array Depth-First Search+1	Read
1723. Find Minimum Time to Finish All Jobs	Hard	46.1%	Array Backtracking+3	Read
1724. Checking Existence of Edge Length Limited Paths II	Hard	51.2%	Graph Minimum Spanning Tree+1	Read
1725. Number Of Rectangles That Can Form The Largest Square	Easy	79.5%	Array	Read
1726. Tuple with Same Product	Medium	70.1%	Array Counting+1	Read
1727. Largest Submatrix With Rearrangements	Medium	80.3%	Array Greedy+2	Read
1728. Cat and Mouse II	Hard	40.4%	Array Dynamic Programming+6	Read
1729. Find Followers Count	Easy	69.3%	Database	Read
1730. Shortest Path to Get Food	Medium	57.1%	Array Breadth-First Search+1	Read
1731. The Number of Employees Which Report to Each Employee	Easy	50.6%	Database	Read
1732. Find the Highest Altitude	Easy	84.7%	Array Prefix Sum	Read
1733. Minimum Number of People to Teach	Medium	67.7%	Array Greedy+1	Read
1734. Decode XORed Permutation	Medium	67.0%	Array Bit Manipulation	Read
1735. Count Ways to Make Array With Product	Hard	55.8%	Array Combinatorics+3	Read
1736. Latest Time by Replacing Hidden Digits	Easy	43.7%	Greedy String	Read
1737. Change Minimum Characters to Satisfy One of Three Conditions	Medium	38.4%	Counting Hash Table+2	Read
1738. Find Kth Largest XOR Coordinate Value	Medium	64.3%	Array Bit Manipulation+6	Read
1739. Building Boxes	Hard	52.5%	Binary Search Greedy+1	Read
1740. Find Distance in a Binary Tree	Medium	74.3%	Binary Tree Breadth-First Search+3	Read
1741. Find Total Time Spent by Each Employee	Easy	86.9%	Database	Read
1742. Maximum Number of Balls in a Box	Easy	74.8%	Counting Hash Table+1	Read
1743. Restore the Array From Adjacent Pairs	Medium	74.7%	Array Depth-First Search+1	Read
1744. Can You Eat Your Favorite Candy on Your Favorite Day?	Medium	36.1%	Array Prefix Sum	Read
1745. Palindrome Partitioning IV	Hard	45.2%	Dynamic Programming String	Read
1746. Maximum Subarray Sum After One Operation	Medium	65.2%	Array Dynamic Programming	Read
1747. Leetflex Banned Accounts	Medium	62.9%	Database	Read
1748. Sum of Unique Elements	Easy	80.4%	Array Counting+1	Read
1749. Maximum Absolute Sum of Any Subarray	Medium	71.1%	Array Dynamic Programming	Read
1750. Minimum Length of String After Deleting Similar Ends	Medium	55.9%	String Two Pointers	Read

#1701Medium

Average Waiting Time

ArraySimulation

Acceptance: 73.1%

#1702Medium

Maximum Binary String After Change

GreedyString

Acceptance: 48.1%

#1703Hard

Minimum Adjacent Swaps for K Consecutive Ones

ArrayGreedyPrefix Sum+1

Acceptance: 42.8%

#1704Easy

Determine if String Halves Are Alike

CountingString

Acceptance: 78.6%

#1705Medium

Maximum Number of Eaten Apples

ArrayGreedyHeap (Priority Queue)

Acceptance: 44.2%

#1706Medium

Where Will the Ball Fall

ArrayMatrixSimulation

Acceptance: 71.9%

#1707Hard

Maximum XOR With an Element From Array

ArrayBit ManipulationTrie

Acceptance: 59.0%

#1708Easy

Largest Subarray Length K

ArrayGreedy

Acceptance: 65.7%

#1709Medium

Biggest Window Between Visits

Database

Acceptance: 70.3%

#1710Easy

Maximum Units on a Truck

ArrayGreedySorting

Acceptance: 75.3%

#1711Medium

Count Good Meals

ArrayHash Table

Acceptance: 32.7%

#1712Medium

Ways to Split Array Into Three Subarrays

ArrayBinary SearchPrefix Sum+1

Acceptance: 34.2%

#1713Hard

Minimum Operations to Make a Subsequence

ArrayBinary SearchGreedy+1

Acceptance: 49.7%

#1714Hard

Sum Of Special Evenly-Spaced Elements In Array

ArrayDynamic Programming

Acceptance: 49.9%

#1715Medium

Count Apples and Oranges

Database

Acceptance: 75.6%

#1716Easy

Calculate Money in Leetcode Bank

Math

Acceptance: 82.4%

#1717Medium

Maximum Score From Removing Substrings

GreedyStackString

Acceptance: 66.6%

#1718Medium

Construct the Lexicographically Largest Valid Sequence

ArrayBacktracking

Acceptance: 72.7%

#1719Hard

Number Of Ways To Reconstruct A Tree

GraphTree

Acceptance: 46.3%

#1720Easy

Decode XORed Array

ArrayBit Manipulation

Acceptance: 87.3%

#1721Medium

Swapping Nodes in a Linked List

Linked ListTwo Pointers

Acceptance: 69.3%

#1722Medium

Minimize Hamming Distance After Swap Operations

ArrayDepth-First SearchUnion Find

Acceptance: 69.6%

#1723Hard

Find Minimum Time to Finish All Jobs

ArrayBacktrackingBit Manipulation+2

Acceptance: 46.1%

#1724Hard

Checking Existence of Edge Length Limited Paths II

GraphMinimum Spanning TreeUnion Find

Acceptance: 51.2%

#1725Easy

Number Of Rectangles That Can Form The Largest Square

Array

Acceptance: 79.5%

#1726Medium

Tuple with Same Product

ArrayCountingHash Table

Acceptance: 70.1%

#1727Medium

Largest Submatrix With Rearrangements

ArrayGreedyMatrix+1

Acceptance: 80.3%

#1728Hard

Cat and Mouse II

ArrayDynamic ProgrammingGame Theory+5

Acceptance: 40.4%

#1729Easy

Find Followers Count

Database

Acceptance: 69.3%

#1730Medium

Shortest Path to Get Food

ArrayBreadth-First SearchMatrix

Acceptance: 57.1%

#1731Easy

The Number of Employees Which Report to Each Employee

Database

Acceptance: 50.6%

#1732Easy

Find the Highest Altitude

ArrayPrefix Sum

Acceptance: 84.7%

#1733Medium

Minimum Number of People to Teach

ArrayGreedyHash Table

Acceptance: 67.7%

#1734Medium

Decode XORed Permutation

ArrayBit Manipulation

Acceptance: 67.0%

#1735Hard

Count Ways to Make Array With Product

ArrayCombinatoricsDynamic Programming+2

Acceptance: 55.8%

#1736Easy

Latest Time by Replacing Hidden Digits

GreedyString

Acceptance: 43.7%

#1737Medium

Change Minimum Characters to Satisfy One of Three Conditions

CountingHash TablePrefix Sum+1

Acceptance: 38.4%

#1738Medium

Find Kth Largest XOR Coordinate Value

ArrayBit ManipulationDivide and Conquer+5

Acceptance: 64.3%

#1739Hard

Building Boxes

Binary SearchGreedyMath

Acceptance: 52.5%

#1740Medium

Find Distance in a Binary Tree

Binary TreeBreadth-First SearchDepth-First Search+2

Acceptance: 74.3%

#1741Easy

Find Total Time Spent by Each Employee

Database

Acceptance: 86.9%

#1742Easy

Maximum Number of Balls in a Box

CountingHash TableMath

Acceptance: 74.8%

#1743Medium

Restore the Array From Adjacent Pairs

ArrayDepth-First SearchHash Table

Acceptance: 74.7%

#1744Medium

Can You Eat Your Favorite Candy on Your Favorite Day?

ArrayPrefix Sum

Acceptance: 36.1%

#1745Hard

Palindrome Partitioning IV

Dynamic ProgrammingString

Acceptance: 45.2%

#1746Medium

Maximum Subarray Sum After One Operation

ArrayDynamic Programming

Acceptance: 65.2%

#1747Medium

Leetflex Banned Accounts

Database

Acceptance: 62.9%

#1748Easy

Sum of Unique Elements

ArrayCountingHash Table

Acceptance: 80.4%

#1749Medium

Maximum Absolute Sum of Any Subarray

ArrayDynamic Programming

Acceptance: 71.1%

#1750Medium

Minimum Length of String After Deleting Similar Ends

StringTwo Pointers

Acceptance: 55.9%

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